Hydrophilic and transparent TiO2 thin film was fabricated by sol-gel method and the properties of contact angle,
surface morphology, and transmittance were measured. In addition, surfactant Tween 80 was used for increasing the
hydrophilic property of thin film. When the contents of Tween 80 in TiO2 solution was 0, 10, 30, 50 wt%, the contact
angles of TiO2 thin film were 41.4
o
, 18.2
o
, 16.0
o
, 13.2
o
, respectively. Fabricated TiO2 thin film showed the photocatalytic
property that decomposed methylene blue and decreased the absorbance of solution after UV irradiation. TiO2 thin films
fabricated with the solution of 30 wt% Tween 80 were deposited on glass (bare), antimony tin oxide (ATO), fluorine tin
oxide (FTO), indium tin oxide (ITO) coated glass substrates, and the contact angle and transmittance of thin film was
measured. The contact angles of thin films deposited on four substrates were 16.2~27.1
o
and was decreased to the range of
13.2~17.6
o
after UV irradiation. Especially, the thin films coated on ATO and FTO glass substrate showed high
transmittance of 74.6 % and 76.8 % in visible range, respectively, and low transmittance of 54.2 % and 40.4 % in infrared
range, respectively.